Changes to handle exception in decimal quantize (#251)

config/dpkg/changelog

@@ -1,5 +1,5 @@
-dfdatetime (20221218-1) unstable; urgency=low
+dfdatetime (20230225-1) unstable; urgency=low
 
   * Auto-generated
 
- -- Log2Timeline maintainers <[email protected]>  Sun, 18 Dec 2022 13:12:18 +0100
+ -- Log2Timeline maintainers <[email protected]>  Sat, 25 Feb 2023 08:38:51 +0100

dfdatetime/__init__.py

@@ -25,4 +25,4 @@
 from dfdatetime import webkit_time
 
 
-__version__ = '20221218'
+__version__ = '20230225'

dfdatetime/interface.py

@@ -969,21 +969,30 @@ def GetDateWithTimeOfDay(self):
     """
     return self._GetDateWithTimeOfDay()
 
-  # TODO: remove this method when there is no more need for it in plaso.
+  # TODO: remove this method when there is no more need for it in Plaso.
   def GetPlasoTimestamp(self):
     """Retrieves a timestamp that is compatible with Plaso.
 
     Returns:
       int: a POSIX timestamp in microseconds or None if no timestamp is
           available.
+
+    Raises:
+      ValueError: if the timestamp cannot be determined.
     """
     normalized_timestamp = self._GetNormalizedTimestamp()
     if normalized_timestamp is None:
       return None
 
     normalized_timestamp *= definitions.MICROSECONDS_PER_SECOND
-    normalized_timestamp = normalized_timestamp.quantize(
-        1, rounding=decimal.ROUND_HALF_UP)
+
+    try:
+      normalized_timestamp = normalized_timestamp.quantize(
+          1, rounding=decimal.ROUND_HALF_UP)
+    except decimal.InvalidOperation as exception:
+      raise ValueError(
+          f'Unable to round normalized timestamp with error: {exception!s}')
+
     return int(normalized_timestamp)
 
   def GetTimeOfDay(self):

tests/cocoa_time.py

@@ -134,7 +134,7 @@ def testGetDateWithTimeOfDay(self):
     self.assertEqual(
         date_with_time_of_day_tuple, (None, None, None, None, None, None))
 
-  # TODO: remove this method when there is no more need for it in plaso.
+  # TODO: remove this method when there is no more need for it in Plaso.
   def testGetPlasoTimestamp(self):
     """Tests the GetPlasoTimestamp function."""
     cocoa_time_object = cocoa_time.CocoaTime(timestamp=395011845.0)

tests/delphi_date_time.py

@@ -177,6 +177,26 @@ def testGetDateWithTimeOfDay(self):
     self.assertEqual(
         date_with_time_of_day_tuple, (None, None, None, None, None, None))
 
+  # TODO: remove this method when there is no more need for it in Plaso.
+  def testGetPlasoTimestamp(self):
+    """Tests the GetPlasoTimestamp function."""
+    delphi_date_time_object = delphi_date_time.DelphiDateTime(
+        timestamp=41443.8263953)
+
+    micro_posix_timestamp = delphi_date_time_object.GetPlasoTimestamp()
+    self.assertEqual(micro_posix_timestamp, 1371585000553920)
+
+    delphi_date_time_object = delphi_date_time.DelphiDateTime()
+
+    micro_posix_timestamp = delphi_date_time_object.GetPlasoTimestamp()
+    self.assertIsNone(micro_posix_timestamp)
+
+    delphi_date_time_object = delphi_date_time.DelphiDateTime(
+        timestamp=8.0e+174)
+
+    with self.assertRaises(ValueError):
+      delphi_date_time_object.GetPlasoTimestamp()
+
   def testGetTimeOfDay(self):
     """Tests the GetTimeOfDay function."""
     delphi_date_time_object = delphi_date_time.DelphiDateTime(